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convert.js
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convert.js
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/*
* Convert files taken from SoundCloud (mp3 files) to webm files, then convert them to base64.
*/
const fs = require('fs')
const path = require('path')
const { exec } = require('child_process')
const ffmpeg = require('fluent-ffmpeg')
const inputPath = __dirname + "/ClientApp/public/audio/german/"
const acceptFileType = ".mp3"
const outputFileType = '.webm'
let fileToBase64 = (filePath, fileBaseName, callback) => {
let data = fs.readFileSync(filePath)
let base64 = `data:audio/${outputFileType.replace('.', '')};base64,` + data.toString('base64')
fs.writeFileSync(inputPath + fileBaseName, base64)
callback()
}
fs.readdir(inputPath, (err, files) => {
if (err)
throw err
files
.filter(fileName => path.extname(fileName) === acceptFileType)
.forEach(fileName => {
let fileBaseName = path.basename(fileName, acceptFileType)
let inputFilePath = inputPath + fileName
let outputFilePath = inputPath + fileBaseName + outputFileType
ffmpeg(inputFilePath)
.addOption('-dash 1')
.on('end', () => {
console.log(`converted ${fileName} to ${outputFileType}`)
/*
fileToBase64(outputFilePath, fileBaseName, () => {
console.log(`converted ${fileName} to base64`)
})
*/
})
.on('error', () => {
console.log('error converting ${fileName}')
})
.save(outputFilePath)
})
})